CN211352539U - Intelligent dimming circuit for LED lamp illumination driving and LED device - Google Patents
Intelligent dimming circuit for LED lamp illumination driving and LED device Download PDFInfo
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- CN211352539U CN211352539U CN202020015735.2U CN202020015735U CN211352539U CN 211352539 U CN211352539 U CN 211352539U CN 202020015735 U CN202020015735 U CN 202020015735U CN 211352539 U CN211352539 U CN 211352539U
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Abstract
The utility model belongs to the technical field of electronic circuit, an intelligent dimming circuit and a LED device for LED lamp lighting drive are provided, including main road component, the subassembly of bleeding, intelligent component, duty cycle detection module, main road open detection module, gauze detection module, main road switch control module and the switch control module of bleeding, wherein, duty cycle detection module is used for detecting the duty cycle of the pulse signal of intelligent component output, and main road open detection module is used for confirming the main road open signal, and gauze detection module is used for confirming gauze periodic signal, and when the duty cycle of signal is opened through controlling the main road and the duty cycle of pulse signal is unanimous, can realize the intelligent dimming to LED lamp cluster; meanwhile, the bleeder component is kept closed in the current network period after the main circuit component is detected to be started, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in the preset time period, the discharge assembly is controlled to maintain the closed state, and the reduction of the standby power consumption is realized.
Description
Technical Field
The utility model belongs to the technical field of electronic circuit, especially, relate to an intelligent light-adjusting circuit and LED device for LED lamp illumination drive.
Background
In a control system of an electronic circuit, when a thyristor is connected and is switched on, a minimum maintaining current is needed, and if the current of the system is less than the minimum maintaining current, the thyristor is gradually closed; when the main current is PWM (Pulse Width Modulation) waveform, the thyristor can be caused to continuously enter the switching state, and the voltage of the line network can generate sawtooth wave, thereby affecting the waveform of the main current. In a traditional scheme, a PWM signal directly controls the current of a main circuit, and in order to enable the main circuit to work normally, the bleeder current needs to be kept in a always-on state, so that the power consumption of a system is overlarge; and, when the intelligent module is in standby, the bleed cannot be closed.
Therefore, in the existing LED lamp lighting driving technology, in order to enable the main circuit to work normally, the bleeder current needs to be maintained in a always-on state, which causes the power consumption of the system to be too large; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an intelligent dimming circuit and a LED device for LED lamp illumination driving, aiming at solving the problems that the prior LED lamp illumination driving technology needs to maintain a always-on state of the discharge current in order to ensure the normal work of a main circuit, thus causing overlarge system power consumption; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
The utility model discloses the first aspect provides a be used for LED lamp illumination driven intelligent light-adjusting circuit, include:
a main path component and a bleeding component;
an intelligent component configured to generate a pulse signal;
the duty ratio detection component is connected with the intelligent component and is configured to detect the duty ratio of the pulse signal and transmit the pulse signal;
a main circuit starting detection component configured to confirm a main circuit starting signal and transmit the main circuit starting signal, wherein the duty ratio of the main circuit starting signal is consistent with the duty ratio of the pulse signal;
a net detection component configured to identify a net periodic signal and transmit the net periodic signal;
a main circuit switch control component, connected to the duty cycle detection component, the main circuit turn-on detection component and the net detection component, and configured to control the main circuit component to turn on or off according to the pulse signal, the main circuit turn-on signal and the net periodic signal; and
the bleeder switch control assembly is connected with the duty ratio detection assembly, the main circuit starting detection assembly and the wire network detection assembly and is configured to control the bleeder assembly to keep closed in the current wire network period after the main circuit assembly is started according to the main circuit starting signal and the wire network period signal; or when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, controlling the discharge assembly to maintain the closed state.
Preferably, the method further comprises the following steps:
and the rectifying component is connected with the intelligent component and is configured to output the voltage signal output by the alternating current power supply to the intelligent component after rectification processing.
Preferably, the method further comprises the following steps:
and the fusing component is connected with the rectifying component and is configured to perform fusing processing when the voltage signal output by the alternating current power supply exceeds a preset threshold value.
Preferably, the wire mesh detection assembly comprises:
a first resistor, a second resistor and a third comparator;
the first end of the first resistor is connected with a reference voltage, the second end of the first resistor and the first end of the second resistor are connected with a positive phase input end of the third comparator, an inverted phase input end of the third comparator is connected with a reference voltage, and an output end of the third comparator is connected with the main circuit switch control component.
Preferably, the bleeding component is implemented by using an operational amplifier.
Preferably, the main path component and the main path startup detection component are both implemented by using comparators.
Preferably, the rectifying component is implemented by a rectifying bridge.
Preferably, the fuse assembly includes:
fuses and varistors;
the first end of the fuse is connected with the live wire end of the alternating current power supply, the second end of the fuse and the first end of the piezoresistor are connected with the rectifying assembly, and the second end of the piezoresistor is connected with the zero line end of the alternating current power supply.
The utility model discloses the second aspect provides a LED device, including LED lamp cluster and alternating current power supply, the LED device still includes as above-mentioned intelligent light-adjusting circuit.
The utility model provides a be used for LED lamp lighting driven intelligent dimming circuit and LED device, including the main road subassembly, the subassembly of bleeding, the intelligent component, duty cycle detection module, the main road opens detection module, gauze detection module, main road on-off control module and the switch control module of bleeding, wherein, the duty cycle detection module is used for detecting the duty cycle of the pulse signal of intelligent component output, the main road opens detection module and is used for confirming the main road and opens the signal, gauze detection module is used for confirming gauze periodic signal, when the duty cycle of the pulse signal of opening the signal through control main road is unanimous with the duty cycle of the pulse signal of intelligent component output, can realize the intelligent dimming to LED lamp cluster; the bleeder component is kept closed in the current network period after the main circuit component is detected to be opened, namely the bleeder component is only required to be kept opened before the main circuit component is opened, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, the bleeder component is controlled to maintain the off state until the duty ratio of the pulse signal is detected to be not zero next time, so that the standby power consumption is reduced, and the problem that in the existing LED lamp illumination driving technology, in order to enable a main circuit to work normally, the bleeder current needs to be maintained in a always-on state, so that the system power consumption is overlarge is solved; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
Drawings
Fig. 1 is a schematic diagram of a module structure of an intelligent dimming circuit for driving an LED lamp according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a module structure of an intelligent dimming circuit for driving an LED lamp according to another embodiment of the present invention.
Fig. 3 is an exemplary circuit diagram of the smart dimming circuit for LED lamp lighting driving corresponding to fig. 2.
Fig. 4 is a schematic waveform diagram of a current signal in an intelligent dimming circuit for LED lamp illumination driving provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
According to the intelligent dimming circuit and the LED device for LED lamp illumination driving, when the duty ratio of the main circuit starting signal is controlled to be consistent with the duty ratio of the pulse signal, intelligent dimming of the LED lamp string can be achieved; meanwhile, the bleeder component is kept closed in the current network period after the main circuit component is detected to be started, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in the preset time period, the discharge assembly is controlled to maintain the closed state, and the reduction of the standby power consumption is realized.
Fig. 1 shows a module structure of an intelligent dimming circuit for LED lamp illumination driving according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment are shown, which are detailed as follows:
the above-mentioned intelligent dimming circuit for LED lamp illumination driving includes a main circuit component 106, a bleeding component 108, an intelligent component 101, a duty ratio detection component 102, a main circuit turn-on detection component 105, a line network detection component 104, a main circuit switch control component 103, and a bleeding switch control component 107.
The intelligent component 101 is configured to generate a pulse signal.
The duty ratio detection component 102 is connected to the intelligent component 101, and is configured to detect a duty ratio of the pulse signal and transmit the pulse signal.
Main path turn-on detection component 105 is configured to assert a main path turn-on signal and transmit the main path turn-on signal; and the duty ratio of the main circuit starting signal is consistent with that of the pulse signal.
The net detection component 104 is configured to identify a net cycle signal and transmit the net cycle signal.
The main switch control component 103 is connected to the duty ratio detection component 102, the main turn-on detection component 105, and the net detection component 104, and configured to control the main component 106 to turn on or off according to the pulse signal, the main turn-on signal, and the net period signal.
The bleeder switch control component 107 is connected to the duty ratio detection component 102, the main path startup detection component 105, and the net detection component 104, and configured to control the bleeder component 108 to keep off in the current net period after the main path component 106 is started according to the main path startup signal and the net period signal; or when the duty ratio of the pulse signal is continuously zero within the preset time period, the bleeding component 108 is controlled to maintain the closed state until the duty ratio of the pulse signal is detected to be not zero next time.
Specifically, the intelligent dimming circuit is connected to a thyristor, and the intelligent component 101 is configured to generate a pulse signal, that is, a PWM signal, and transmit the pulse signal to the duty ratio detection component 102 to detect the duty ratio of the PWM signal, so as to obtain the duty ratio of the PWM signal; the main circuit starting detection component 105 confirms the main circuit starting signal, so that the duty ratio of the main circuit starting signal is obtained, the duty ratio of the main circuit starting signal is controlled to be consistent with the duty ratio of the pulse signal, and the intelligent dimming effect of the LED lamp string is achieved.
Secondly, the main circuit switch control component 103 controls the main circuit component 106 to be correspondingly turned on or off according to the pulse signal, the main circuit turn-on signal and the line network periodic signal;
the bleeder switch control assembly 107 controls the bleeder assembly 108 to be correspondingly turned on or off according to the main path turn-on signal and the line network periodic signal;
more importantly, the bleeding component 108 is kept off in the current net period after the main component 106 is turned on, and the bleeding component 108 only needs to be kept on before the main component 106 is turned on, so that the power consumption is reduced.
And when detecting that the duty ratio of the pulse signal is continuously 0% in a period of time, the bleeding component 108 is kept closed for a long time until detecting that the duty ratio is not 0%, thereby reducing the standby power consumption. The preset time can be set according to actual requirements.
Fig. 2 shows a module structure of an intelligent dimming circuit for LED lamp illumination driving according to another embodiment of the present invention, and for convenience of description, only the parts related to this embodiment are shown, which are detailed as follows:
as an embodiment of the present invention, the above-mentioned intelligent dimming circuit further includes a rectifying component 109, and the rectifying component 109 is connected with the intelligent component 101, and is configured to output to the intelligent component 101 after the voltage signal outputted by the ac power supply 111 is rectified.
Specifically, the rectifying component 109 is implemented by full-bridge rectification, but may also be implemented by half-bridge rectification.
As an embodiment of the utility model, above-mentioned intelligent dimming circuit still includes fusing subassembly 110, and fusing subassembly 110 is connected with rectification subassembly 109, is configured to when the voltage signal of alternating current power supply 111 output surpassed preset threshold value, then carries out fusing processing, avoids appearing leading to causing the problem of damage to overall circuit's components and parts because of excessive pressure overflows.
Fig. 3 shows an example circuit of the smart dimming circuit for LED lamp lighting driving corresponding to fig. 2, and for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
as an embodiment of the present invention, the wire mesh detecting assembly 104 includes a first resistor R1, a second resistor R2, and a third comparator U3.
The first end of the first resistor R1 is connected to the reference voltage VIN, the second end of the first resistor R1 and the first end of the second resistor R2 are connected to the non-inverting input terminal of the third comparator U3, the inverting input terminal of the third comparator U3 is connected to the reference voltage, and the output terminal of the third comparator U3 is connected to the main switch control module 103.
As an embodiment of the present invention, the above-mentioned bleeding component 108 is implemented by using an operational amplifier U4.
As an embodiment of the present invention, the main path component 106 and the main path opening detection component 105 are implemented by using comparators, the main path component 106 is represented by a first comparator U1 in fig. 3, and the main path opening detection component 105 is represented by a second comparator U2.
As an embodiment of the present invention, the above-mentioned rectifying component 109 is implemented by using a rectifying bridge DB 1.
As an embodiment of the present invention, the fuse assembly 110 includes a fuse FR1 and a varistor RV 1.
The first end of the fuse FR1 is connected with the live wire end of the alternating current power supply 111, the second end of the fuse FR1 and the first end of the piezoresistor RV1 are connected with the rectifying assembly 109, and the second end of the piezoresistor RV1 is connected with the neutral wire end of the alternating current power supply 111.
The utility model also provides a LED device, including LED lamp cluster and alternating current power supply, still include as above-mentioned intelligent light-adjusting circuit.
It should be noted that, the LED device is added with an LED string and an ac power supply on the basis of the above-mentioned smart dimming circuit, so that the functional description and the principle description of the smart component 101, the duty ratio detection component 102, the main circuit switch control component 103, the net detection component 104, the main circuit start detection component 105, the main circuit component 106, the bleeder switch control component 107, the bleeder component 108, the rectification component 109, and the fuse component 110 in the smart dimming circuit can refer to the embodiments of fig. 1 to 3, and are not repeated herein.
Fig. 4 shows the waveform of the current signal in the intelligent dimming circuit for LED lamp illumination driving provided by the present invention, and the following description is made in conjunction with fig. 4 on the working principle of the intelligent dimming circuit:
firstly, the duty ratio detection component 102 detects the duty ratio of the PWM signal, and times at the rising edge of the main circuit startup signal V6 according to the corresponding duty ratio to control the main circuit startup duration;
secondly, when a rising edge of V6 is detected, the bleeding switch control assembly 107 sends a closing signal to the bleeding assembly 108 to control the bleeding assembly 108 to close;
finally, the above control logic resets each time a falling edge of V5 is detected.
To sum up, the embodiment of the utility model provides an intelligent dimming circuit and LED device for LED lamp lighting drive, including main road subassembly, the subassembly of bleeding, intelligent subassembly, duty cycle detection module, main road open detection module, gauze detection module, main switch control module and the switch control module of bleeding, wherein, duty cycle detection module is used for detecting the duty cycle of the pulse signal of intelligent component output, and main road open detection module is used for confirming the main road and opens the signal, and gauze detection module is used for confirming gauze cycle signal, when the duty cycle of the pulse signal of signal is unanimous with the duty cycle of the pulse signal of intelligent component output through controlling the main road, can realize the intelligent dimming to LED lamp cluster; the bleeder component is kept closed in the current network period after the main circuit component is detected to be opened, namely the bleeder component is only required to be kept opened before the main circuit component is opened, so that the effect of reducing power consumption is achieved; and when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, the bleeder component is controlled to maintain the off state until the duty ratio of the pulse signal is detected to be not zero next time, so that the standby power consumption is reduced, and the problem that in the existing LED lamp illumination driving technology, in order to enable a main circuit to work normally, the bleeder current needs to be maintained in a always-on state, so that the system power consumption is overlarge is solved; and when the intelligent module is in standby, the problem that the drainage can not be closed is solved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. An intelligent dimming circuit for driving an LED lamp to illuminate, comprising:
a main path component and a bleeding component;
an intelligent component configured to generate a pulse signal;
the duty ratio detection component is connected with the intelligent component and is configured to detect the duty ratio of the pulse signal and transmit the pulse signal;
a main circuit starting detection component configured to confirm a main circuit starting signal and transmit the main circuit starting signal, wherein the duty ratio of the main circuit starting signal is consistent with the duty ratio of the pulse signal;
a net detection component configured to identify a net periodic signal and transmit the net periodic signal;
a main circuit switch control component, connected to the duty cycle detection component, the main circuit turn-on detection component and the net detection component, and configured to control the main circuit component to turn on or off according to the pulse signal, the main circuit turn-on signal and the net periodic signal; and
the bleeder switch control assembly is connected with the duty ratio detection assembly, the main circuit starting detection assembly and the wire network detection assembly and is configured to control the bleeder assembly to keep closed in the current wire network period after the main circuit assembly is started according to the main circuit starting signal and the wire network period signal; or when the duty ratio of the pulse signal is detected to be zero continuously in a preset time period, controlling the discharge assembly to maintain the closed state.
2. The smart dimming circuit of claim 1, further comprising:
and the rectifying component is connected with the intelligent component and is configured to output the voltage signal output by the alternating current power supply to the intelligent component after rectification processing.
3. The smart dimming circuit of claim 2, further comprising:
and the fusing component is connected with the rectifying component and is configured to perform fusing processing when the voltage signal output by the alternating current power supply exceeds a preset threshold value.
4. The smart dimming circuit of claim 1, wherein the net detection component comprises:
a first resistor, a second resistor and a third comparator;
the first end of the first resistor is connected with a reference voltage, the second end of the first resistor and the first end of the second resistor are connected with a positive phase input end of the third comparator, an inverted phase input end of the third comparator is connected with a reference voltage, and an output end of the third comparator is connected with the main circuit switch control component.
5. The smart dimming circuit of claim 1, wherein the bleeding component is implemented using an operational amplifier.
6. The smart dimming circuit of claim 1, wherein the main circuit component and the main circuit turn-on detection component are both implemented with comparators.
7. The smart dimming circuit of claim 2, wherein the rectifying component is implemented using a rectifier bridge.
8. The smart dimming circuit of claim 3, wherein the fuse assembly comprises:
fuses and varistors;
the first end of the fuse is connected with the live wire end of the alternating current power supply, the second end of the fuse and the first end of the piezoresistor are connected with the rectifying assembly, and the second end of the piezoresistor is connected with the zero line end of the alternating current power supply.
9. An LED device comprising a string of LEDs and an ac power source, wherein the LED device further comprises the smart dimmer circuit as claimed in any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020015735.2U CN211352539U (en) | 2020-01-02 | 2020-01-02 | Intelligent dimming circuit for LED lamp illumination driving and LED device |
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| CN202020015735.2U CN211352539U (en) | 2020-01-02 | 2020-01-02 | Intelligent dimming circuit for LED lamp illumination driving and LED device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050445A (en) * | 2020-01-02 | 2020-04-21 | 深圳市明微电子股份有限公司 | Intelligent dimming circuit and method for LED lamp illumination driving and LED device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050445A (en) * | 2020-01-02 | 2020-04-21 | 深圳市明微电子股份有限公司 | Intelligent dimming circuit and method for LED lamp illumination driving and LED device |
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